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11/12: 1 7/15 ajutor dau coroana

Răspuns :

11/12 : 1 intreg 7/15 =

= 11/12 : 22/15 =

= 11/12*15/22 =

= 1/4*5/2 =  5/8
1 intreg si 7/15 = ( 1× 15 + 7) / 15 = 22/15

11/12 : 22/15 = 11/12 ×15/22 = 5/(4×2)= 5/8